Values comparison

[zinal]

Added the Value<?> comparison support to facilitate the future KeyRange.contains() feature.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 32.41590% with 221 lines in your changes missing coverage. Please review.
✅ Project coverage is 60.81%. Comparing base (af5f970) to head (85785c5).

Files with missing lines	Patch %	Lines
...ain/java/tech/ydb/table/values/PrimitiveValue.java	26.92%	35 Missing and 3 partials ⚠️
.../main/java/tech/ydb/table/values/DecimalValue.java	7.89%	22 Missing and 13 partials ⚠️
...src/main/java/tech/ydb/table/values/DictValue.java	48.00%	17 Missing and 9 partials ⚠️
...src/main/java/tech/ydb/table/values/ListValue.java	37.14%	15 Missing and 7 partials ⚠️
...c/main/java/tech/ydb/table/values/StructValue.java	37.14%	15 Missing and 7 partials ⚠️
...rc/main/java/tech/ydb/table/values/TupleValue.java	37.14%	15 Missing and 7 partials ⚠️
.../main/java/tech/ydb/table/values/VariantValue.java	29.03%	15 Missing and 7 partials ⚠️
...src/main/java/tech/ydb/table/values/NullValue.java	7.69%	9 Missing and 3 partials ⚠️
...src/main/java/tech/ydb/table/values/VoidValue.java	7.69%	9 Missing and 3 partials ⚠️
...main/java/tech/ydb/table/values/OptionalValue.java	60.00%	6 Missing and 4 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #521      +/-   ##
============================================
- Coverage     61.29%   60.81%   -0.48%     
- Complexity     2306     2365      +59     
============================================
  Files           328      328              
  Lines         13468    13795     +327     
  Branches       1344     1437      +93     
============================================
+ Hits           8255     8390     +135     
- Misses         4577     4705     +128     
- Partials        636      700      +64     

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